Hydroxyapatite from Natural Sources for Medical Applications.

Area of Science:

• Biomaterials Science
• Materials Chemistry
• Nanotechnology

Background:

• Hydroxyapatite (HAp) is a key biomaterial for bone regeneration.
• Developing cost-effective and sustainable synthesis methods is crucial.
• Natural sources offer a promising alternative for hydroxyapatite production.

Purpose of the Study:

• To investigate the physical-chemical, mechanical, and biocompatible properties of hydroxyapatite.
• To synthesize hydroxyapatite nanopowders from natural Rapana whelk shells using hydrothermal methods.
• To evaluate the potential of this hydroxyapatite for biomedical applications.

Main Methods:

• Hydrothermal synthesis at low temperatures and high pressures.
• Characterization using FT-IR, DLS, SEM, and XRD.
• In vitro cytotoxicity and cell proliferation assays on osteoblast cell lines.
• Preliminary mechanical testing (tensile strength, coefficient of friction).

Main Results:

• Synthesized hydroxyapatite nanopowders with crystallite size <50 nm and particle size <100 nm.
• Achieved a Ca:P ratio close to stoichiometric and controlled spherical morphology.
• Sintered samples showed promising tensile strength and appropriate coefficient of friction.
• Low cytotoxicity and enhanced osteoblast proliferation observed.

Conclusions:

• Hydrothermal synthesis from Rapana whelk shells is an effective method for producing nanocrystalline hydroxyapatite.
• The synthesized hydroxyapatite possesses favorable mechanical and biocompatible properties.
• This material shows significant potential for use in bone tissue engineering and other biomechanical applications.